Clock



May 31,1927.A

W. E. COOKE CLOCK vFiled 1360.20, 1924 lll; u

W mm owe Tfr/v Nm., .Eff V WT] Mw A TTORNEIY p fUiTlE-'m PatentedMaylgvfii WILLIAM ERNEST oooKE, onsYJJNEY ,k VNEW soU'ijH Wenns;AUSTRALIA."

I oLooKfw Application fiiedneceinhrer feo; 1'924, fseria1 f irol757Q11a'ana infiiutrii,rebmaiyfis, mail;

This invent-ion relates'A-to improved clock in Whichthe hands' are'automatically moved to indicate appa-renmeamor stand-j 'ard time by theact of f orrning aniimageY of the sunon ai'daychart,

The* inventioncomprisesV apparatus forv indicating on jan?v ordinarycloclrdial kthe correct tim'e diiring sunlight hoursy for every 'day ofJthe-Wyear', 'for determining l0 and indicating ythe geographicalmeridian through the clooksstation, for determining thetrue geographicalbearing otany'loc'af tion lWithin View of the 'olocks 'station asdistinguished from the compass or magnetici* V15l bearing, fordetermining thelattu'dexof the clockls positiom andf for determining thetime Lof lsunrise and-*of sunsetffor any day of the year. 'Y

AIn the accompanying fdravvingszm" f 2.0 Figure `1 isa S'deeleratrlOto'iieiferm Figa@V is a 4plan"viexv omi-Ta jcompasSzCrd or dial usedin' Corineotonoviththe device.

'SCKGWS 11,2111@,asp'irft'level l2, iS @Quoted on a base board 13 vvhiohis adaptedfto be either perma'nenvtlyy ory detachahly secured to 'asuitable pedestalnot sh )W n. 4o

carries an .additionnlplate `'14Whi 1li1iys piva oted on Aand yisadapted to he swung .laterally over: theY plate andato beclampedftliereto f ried loyV the plate 141 isv an, equatorial fplate 18Whiohmay bemadjusted in'vertical 'angular relation 1612118bese-l`atea1idllw YECllfrllllild at the clesirdfangle 0.1 1 eSupportvsucliias. the

curvecl`-ba1f1'9 carriedwbynthe plated-4. "As

the VplateV 141 may loe. moved4 Ylaterally/V the 'equatorial plate 1 8is capable of rotation in 'a horizontal asv Welll Vas inf" a 'verticallplane. Theequatoril plate `18"carries' a clock dial 557-20 and agenemin 21, 22,v and 24cm@- v' trollingthe-clock hands' 25.5126@ the'nstructiveWthvpthe gearing? and 1 As shown in Figs,` '1 and@V the plate1Q parallel .opposite portion BOfQoffthe vpoil'itel i .'.pointer 27inthe formlof an anglebrackli l frame. A memloer 28 of the pointenisisgprovided with a daychartflffli the I i central-J pointl 32 y of whichThe' Dames of tthef reps each month-` are Vindinated,bytheir respeetivenumerals and Vloy sliort'f-dashes Bliong-the/ .f

curved graph34,vvhieh' represents t-hean v gularffdailydisplacement ofthe sun gfro'm'its meanf rosienthat Sfftheequation; fof r time.Forg,oonvenienceof illustration and' toavoid overcrowding ofthechart'five: day l intervals onlyware shown, and each ten day interval isIindicatedloy yits.-Calendar numeral. Y vTo Set the equatoralplate;18;para11e1- t0 the celestial equator thre "operationsgare necessary (11)level ,the baseplate. '10('2) elevateetlljeplate- 18 to make, an 1'anglewith` thejplatefliequalr to Vthe colattud. The s same i resultl-v maybei obtained by elevating theaxis Jonotation :355015 theiisunxpohterto yan altitude equal to rthe latitnde, f 1 (3): flhe base 4plate muSiibegfrot-atedf; inY a horizontal plane luntil the :plate l8g'f'iisparallel l tothe Celestial equation/,andthe axis 'ofrotation fpOi'ntSjtothe/celestialfpoleLfffOnly Wheniin l that f position lwill:Italia:l sunvs4 image,y f formed on". graph: 3 4 by suitablyrotating the sun pointer, always {all ,1 onf the correct date ;mark Toobtain thisv position rotatelooth base, plate and, sun:v 4pointertheformer hori Zonta-ily, the latter ori-'itsA axis, untilthe suns f imageffalls' onA the correct datefmark.

When this occurs' the/"axis `olf' rotation 'mustl he pointing to?thefpole,v thezinstrument'fmust be. correctly orientated,T and therotation jof the sun pointer will haveso moved lthefgear Wheels .thatthecloclxhands; 4will indicatel true.'standard timegE 'E in the Southernand the northin'thejNorthern Hemisphere.g rllhe screw/'A15 isiloosenedTo set-theiiolock for'indioating local-mean ftime thebase'board1'3:isjplaeed oni'apedestal-1 in :approximately the l' geographical meA'.ridianwiththe olookidialiQ() :facing the A'south I 1andqthefbaseplatelevelledg The'su'n pointer pover-the'platelOvuntiltheim'age of the sun l falls' on their-centre line 36 'of 'the {char-tg"the eqliatorial v plate 4'18: Ais then adjusted inverti- `call'angula1':relationr to p'latlefv to l plate lO- until the suns image fallsongtlie y level ot' the correct date inai'lconth'e chart.

j Plate 18 is then clamped to the bar lv9'and plate 14 adjustedlaterally .'to bring.' the -i'mage on the correct date mark. Screw isthen tightened. f

,1 The eomplement ofthe angle B'Zbetweein the pl`ate18` an'df'ther plate14 when the clock* isV correctly set` gives the latitude of the` clocksstation, and this maybe indicated by a'. graduated quadrant 38, mountedon the' lplate 14. Y

compass cardA or a Circle "39 graduated in.'degrees'from'0O to 36.00 maybeinountcd @The time of "sunrise sunset oni the Ldate chosen.' l l orinscribed on Vthe plate 14 vso that when the l clock' is 4correctlysetvthe geographicalnorth Vand south line througli'theclocls position"passes through the'graduations 0o and 1809.

The geographical bearing of any'loeation' i 3415` atthechosen date'markand bring the rod to the horizontal with its free endpointing to the`rising sun; By turning. the hol-L 20mm rod and S1111 pontertofafieftheWest the hands` of the clock indicate the time of is 'providedv'withV anY upst-anding glug. 40 yhavingv a-bay' 41"' in'y which arser'iiioircu'lar supv,The l*supportV 42 1s prov-1 -justably 1. inu-ntedrl'by'jmeans of `a ysliding plate-43 and set screws 44. Y

il' Ameans'45 about which a circular band `frame is connected .withthesun- 46 forming the'sun pointer isl adapted to; be

the/frame withzits central point diametrically opposite*to-thehole129g-lThe equatorial late 18 is .rotatable two planes by the l'rotationofthebasefplate 10 an'dof the/support 42 in the bayl 4iso that the axis85 of the-'pivots 45 may be directedv tothe.celestial'1`poles.v .'Theprincipal gear wheel-of the lgear train controlling Ythe li ands pointerand rotates about the axisj. j i

., riClock hands, notshown, may be `mounted vwhich lies parallel to theaxis'.: f

f The l.faoe of thev semicircular-support 42 is graduatedfor latitudeand antin'd-icator 48 y(Fig. 6), l,facilitates 'correct positioning .ofthe support V42.V` Y 'j `L Ilaim: f' v L1A sun clock comprisingabaseplate,

means for levelling saidplate,"LanV :additional platepivoted on thevbase plate ona 4vertical axis, 5in/equatorial plate: mounted .onand'above l.theadditional' plate, a clock :dial mounted on the equatorialplat,e,fclock hands for the dial, a gear train carre'dby fthe',vequatorial plate and i. controlling the4 i mounted on a hands, and afsunpointer member of the gear train.

i .C f2. Afsun* clock .'coinpr'isin Val'i'ase plate,

levelling screws vron the plate,an equatorial "*plate mounted forangular vertical adjust# .ineiitaboveg the base plateharlemp., adaptedtov retain' the" equatorial "pl'ue" in" anyl of its adjusted positions,.a cloolldial rvCarried'-by the equatorial plate, clock handsfor thedial,

aA gear train'` controlling the hands., and

sun pointer mounted on afinemberot'thej gear train,

B. A un clock corn'prisingfa,basefplate,' i

an additional 'plate pivoted angular'liorif; Zontal adjustmentZwithfrelation to thefb'as'e plateau equatorial plate iiifoiint'ed abovethe additional Aplate 'for angular: adjustment w j vertically withrelation to. said` plate,

clamp adapt'ed Vto *retainu the'l equatorial platein any .of itsVadjusted positionsna second clamp adapted to; retain the'. additionalvplate'in any of its adjusted positioned-A.,

agcloclr'dialv von the. equatorial platefcloclr hands Yfor thefdial, a`gear train controlling a memberv` of the gear train.

. 4QA suncl'ockcomprismg a trolling-the,hands,xa lsunv pointer mountedonY amemher ofthe g'ea'rftrain,a.-perfo rated member .on VYthe sunfpointer'Qand ya n Y y ici lieti, Vclock hands` for the dial,a Vgear"trainconi 'the hands, and a sun pointer inouiitedon ,day` vchartmountedonvlthe. sun pointerfo'r cooperation withfsaid I.lpe'rvtorated.member.

5. jA. Vsun vclockl comprising.. an equatorial plate mounted. forangular adjustment, a

clock -'dial carried4 `by said plategelock' handsmounted 'centrally wot,the dial and. adapted to traverse the 'same,'faf geari train 'fori conftrolling the operation of said hands,` a'l sun 1 pointer mounted ron.ainemberfotthegear train-Qfoifrotation .tlierewithffa perforated .daychart mounted on the sun `.pointer.. op

*pOS-tesaid 'Perforated .inemberi for 'cooperationtherewiai, A n

6. A sun clockcoinprising 'an/*equatorial plate .with itsV axisl adaptedto befdire'cted toward the celestial polesjasunpointer rotatable aboutsaid aXisa clock dial carried bythe plate, clock hands mounted centrallyof said dial andadapted; to vtraverse the same,.-a .gear wheel secured-to the sun pointer, and. a gear trainconnecting thegearlwheelfwith theclock hands.

7. 'A sun clock lconnprisiiig a j levelling screws for the plate, anadditional plate pivoted .on the base plate, an jequatorial 4'platehingedto `the additionalplate,a grad- .uated quadrant on .the additionalVplate forfjiw .cooperation withqfsaid equatorial plate,` ay

clock dial carried bythe equatorial plate',

.memberl' carried by. the sun pointer, and a i `plate inounted'forvertieal angular adjustnient and adapted tobeLset-parallel to the y.celestial equator,a bearing carried by saidV izo base plate, i Y

'eloek hands for the dial, a geartrain controlling the clock hands, anda lrotatable sun pointer mounted on a member of the gear of the geartrain, and a graduated oompassl card mounted above the base plate.

Y 9. A sun clock V,comprising a. cloek dial, clock hands for the d1al, agear tram Con-` trollingthe movements of, the hands, aV s un pointermounted on a member ofy the vgear train a day chart mounted on the: sun

pointer, there being a graph lof the equaHV tion of time on the chart.f'

- 10. A sun eloek comprising `a Clock dial, clock hands for the dial, aigear train vcontrolling-the movements of the hands, a sun pointermounted on av member kof the gear train, a perforated -Y member on thelsun pointer, and a day chart carried by the sun pointer for`cooperationwith said perforated i 'of the mont-hs ofthe-year, agraphoffthe equation of time, graduations representing Y i, selecteddaysof each month and afrepre-l ot the projection of" al-eelestialsentation meridian. l A* i l l1l. A sun clock comprising a base. plate,

levelling serevvstor 1the plate, an additional member, 'said day Yvchart bearing. `ay vrecord plate pivoted on the base plate tor-angulary adjustment ina' Vhorizontal plane, afolamp for retaining theadditional plate in any oit' l' Vits adjusted positions, an equatorialplatel .mounted ontheadditi-onal plate for angular adjustment inavertioal plane, afelamp rfor retaining the equatorial plate in any ofits adjusted'4 positionsf bearing'- carried adapted to be direoted'tovthe celestial poles,

by' the equatorial plate` With *its axis a gear Wheel mounted on saidaxis, a sun pointer mounted on the'gear Wheel, a'elock A`dial andelockrhands for theA dial carried by the equatorial plate, and a geartrain driven by said gear Wlieeland Controlling the a Zmovements,ottheelook hands. 1

In testimony whereof" I have signed'm name to this specification.

WILLAM ERNEST COOKE.

